Multiple bail hoist tackle for pipe flasks



Jan. 3, 1939. R. A. RUSSELL 2,142,415

MULTIPLE BAIL HOIST TACKLE lFOR PI'E FLASKS Filed Nov. 24, 1957 A En 4. Awh (ttornegs Patented Jan. 3, 1939 PATENT OFFICE MULTIPLE BAIL HOIST TACKLE FOR PIPE FLASKS Robert A. Russell, Alexander City, Ala., assignor to Ferro-Spun Corporation, a corporation of Alabama Application November 24, 1937, Serial No. 176,378

9 Claims.

My invention relates to an improved design of hoist tackle particularly arranged for the quick and convenient removal of groups of centrifugal pipe flasks from a ramming table.

My invention is more particularly concerned with articulated hoisting tackle adapted for use with centrifugal pipe flasks in which the sand mold is jolt rammed, the flasks being rammed on end and provided with side trunnions by means of which they are adapted to be lifted, transported, and manipulated in the various operations incident to the ramming of the sand mold and the pouring and shaking out the casting, all as more particularly described in companion applications for pipe molding apparatus and a sand lined centrifugal pipe mold filed concurrently herewith by Herbert H. Farr, Serial Numbers 176,375 and 176,376 respectively.

My multiple bail hoisting tackle is particularly designed for use in a centrifugal pipe molding process wherein one or more pairs of flasks are rammed simultaneously to prevent the slowing up of the process which would result were the flasks rammed singly, since the ramming operation is the slowest step in the complete pipe producing process.

The particular importance to be attached to the use of my multiple bail hoist arises from the fact that the operators are relieved of the necessity of arranging the asks in any particular position on the ramming table, the tackle being adapted to be readily shifted into position for its bail hooks to engage the trunnions on the pair of flasks it is to handle regardless of the relative position of such trunnions on the flasks while they were being rammed. To this end the hoist tackle comprises two bails, one for each flask, swung from the ends of a common swivelled hanger bar which will present each bail centrally above its respective flask and permit its hook elements to be swung horizontally about the ilask axis as a center in any direction necessary for them to engage the flask trunnions.

A further object of my invention is to articulate n the hoist elements in such manner that they can be readily applied regardless of minor diierences in level of the trunnions on a pair of flasks being handled, and that they `will cause both such flasks to be lifted vertically so as to strip them properly from their respective hub patterns on the rammingV table.

My invention further comprises the novel details of construction and arrangements of lparts shown in the accompanying drawing, in which'.-

Fig. 1 is a front elevation of a multiple bail hoist tackle constructed in accordance with my invention.

Fig. 2 is an end View of Fig. 1.

Fig. 3 is a plan view of Fig. 1.

Similar reference numerals refer to similar parts.

In the embodiment of my invention illustrated, I show fragmentally a pair of sand lined centrifugal pipe flasks 5 having riding rings 6, end flanges 'l to receive the stripping plates and complemental parts, not shown, and a diametrically opposed pair of side trunnions 8 disposed near the center of each flask. The hoisting tackle comprises a center eye-bolt 9 adapted to receive the hook of any suitable hoist (not shown). eye-bolt 9 carries a nut IE upon which a hanger oar II rests free to swivel and swing horizontally about the shank of said bolt which passes loosely through a central aperture in the bar.' A pair of bolts i2 depend loosely, and in position to align with the flask centers, from the ends of the hanger bar Il and each passes loosely through a center hole in the top bar I3 of its respective bail, sothat such bar I3 rests upon the bolt head free to have angular play vertically and to swivel in a horizontal plane. Through the ends of each bail bar E3 I loosely pass rods forming the legs id of each bail. These rods are threaded at their upper ends and receive top nuts I5 which rest on the top of their respective bail bar I3, leaving i" the legs free both to swing and swivel. The legs are bent in somewhat at I6 and are provided at their lower ends with hooks Il which areadapted to engage the trunnions 8 of the flasks.

The legs of each bail has, below its respective i bar I3, a stop nut I8 screwed thereon. This stop arrangement may be provided on one leg if desired of leach bail.

In operation, it will be understood that at least two flasks 5 are rammed simultaneously on a jolt table or other ramming table, and when this operation is complete the flasks are lifted in pairs vertically from the table to strip them from the hub core patterns and delivered, after being rocked to horizontal position, onto a track or guides down which they pass in order to the spinning table where the pouring operation is carried out. To lift off the flasks, a crane man c1' hoist operator presents my multiple bail hoist tackle to a pair of flasks that are ready to come off the ramming table, and he can readily swing the bar I I so that it will hang diametrically above the two flasks. Then each bail is swung about its respective hanger bolt I2, as an axis, until it presents its hook ends in position to engage the The trunnions of its respective flask, Whatever their position may be in relation to the trunnions of the companion flask. Thus, the trunnions on one flask may stand in a vertical plane at right angles to the plane of the trunnions of the other flask and yet the bails can be quickly adjusted to lift both flasks simultaneously. Moreover, should the trunnions not happen to stand at the same level, the tackle is sufficiently flexible so that either bail can be pulled higher or lower than the other, and either leg of a bail may likewise be pulled higher or lower than the other leg, so that the tackle is articulated so as to be freely flexible for quick application to the flasks to be handled in pairs and will act to lift the tWo flasks vertically from their respective hub patterns so as to prop- Ierly strip them Without injury to flasks, patterns, or sand prints.

By the use of this articulated, multiple-bail hoist tackle the balls can be set to lift off the flasks in pairs as quickly as they can be disengaged from the ramming table and thus no time need oe lost nor should any slowing up due to handling occur in the operation at this point in the process.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications, Without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is:-

1. An articulated hoist tackle for handling in pairs molding flasks having side trunnions, comprising a hanger bar, an element by which said bar is adapted to be supported near its center free for rotational and angular play, two bails, each comprising a top member and depending spaced side legs having hooks adapted to engage the side trunnions on its respective flask, and means to swivelly suspend each bail from said hanger bar free to turn about a vertical axis substantially concentric with its'respective flask.

2. The combination with a pair of asks each having opposed side trunnions, of a hoist tackle for simultaneously lifting and pivotally supporting said flasks, said tackle comprising la pair of independently adjustable bails, each adapted to straddle its respective flask and pivotally support same by its trunnions, and a common articulated hanger means which swivelly supports said balls substantially concentric with their respective flasks.

3. The combination of elements according to claim 2, in which each bail comprises a top bar and side legs loosely and rotatably hung from said top bar.

4. The combination of elements according to claim 2, in which each bail comprises a top bar and side legs loosely and rotatably hung from said top bar free to be turned and to have relative anguiar play.

5. An articulated hoist tackle for the handling of pairs of upright flasks having side lifting trunnions, comprising a pair of bails, each having a top member and side legs adapted to engage a pair of trunnions and pivotally support a ilask, and a common means to sWivelly support the two bails substantially concentric with their respective flasks and free each for angular and rotational adjustments relative to the other.

6. A hoist tackle for handling a plurality of flasks having side trunnions, comprising a bail for each flask, each bail comprising a top member and hook bearing legs mounted free for angular and rotational play relative to said top member, and a common articulated support for the several balls designed and adapted to suspend each free for adjustment centrally and vertically with respect to its respective flask.

'7. A hoist tackle for handling a plurality of flasks having lifting trunnions, comprising a bail for each flask, each bail comprising a top member and hook bearing legs free for angular and rotational play relative to said top member, and a common articulated support for the several bails designed and adapted to suspend each free for adjustment above and about its respective flask, said common support means comprising coacting elements which permit the bails to have free relative vertical adjustment.

8. An articulated hoist tackle for lifting centrifugal sand lined pipe flasks in pairs, comprising a bail adapted to lift each flask, a center support for each bail adapted to permit angular and rotational adjustment thereof, a common hanger bar from the ends of which each bail support is hung free for rotational and angular adjustments in substantially concentric relation with its respective flask, and a hoist eye by means of which said hanger bar is supported at its center free for angular and rotational adjustment.

9. A hoist tackle in accordance with claim 8, in which the flasks are provided near their centers with side trunnions, and the bails have legs elongated sufficiently to permit the flasks to swing to vertical position between them.

ROBERT A. RUSSELL. 

